diff --git a/src/plugins/clangcodemodel/clangdlocatorfilters.cpp b/src/plugins/clangcodemodel/clangdlocatorfilters.cpp
index 4da1ece4cc8..76efcec54c5 100644
--- a/src/plugins/clangcodemodel/clangdlocatorfilters.cpp
+++ b/src/plugins/clangcodemodel/clangdlocatorfilters.cpp
@@ -23,6 +23,7 @@
 using namespace Core;
 using namespace LanguageClient;
 using namespace LanguageServerProtocol;
+using namespace ProjectExplorer;
 using namespace Utils;
 
 namespace ClangCodeModel {
@@ -30,6 +31,17 @@ namespace Internal {
 
 const int MaxResultCount = 10000;
 
+static QList<Client *> clientsForOpenProjects()
+{
+    QSet<Client *> clients;
+    const QList<Project *> projects = ProjectManager::projects();
+    for (Project *project : projects) {
+        if (Client *client = ClangModelManagerSupport::clientForProject(project))
+            clients << client;
+    }
+    return clients.values();
+}
+
 class CppLocatorFilter : public CppEditor::CppLocatorFilter
 {
 public:
@@ -56,6 +68,10 @@ public:
         setHidden(true);
         setMaxResultCount(MaxResultCount);
     }
+    void prepareSearch(const QString &entry) override
+    {
+        prepareSearchForClients(entry, clientsForOpenProjects());
+    }
 };
 
 
@@ -84,6 +100,10 @@ public:
         setHidden(true);
         setMaxResultCount(MaxResultCount);
     }
+    void prepareSearch(const QString &entry) override
+    {
+        prepareSearchForClients(entry, clientsForOpenProjects());
+    }
 };
 
 class CppFunctionsFilter : public CppEditor::CppFunctionsFilter
@@ -112,6 +132,10 @@ public:
         setHidden(true);
         setMaxResultCount(MaxResultCount);
     }
+    void prepareSearch(const QString &entry) override
+    {
+        prepareSearchForClients(entry, clientsForOpenProjects());
+    }
 };
 
 
@@ -121,7 +145,7 @@ ClangGlobalSymbolFilter::ClangGlobalSymbolFilter()
 }
 
 ClangGlobalSymbolFilter::ClangGlobalSymbolFilter(ILocatorFilter *cppFilter,
-                                                 WorkspaceLocatorFilter *lspFilter)
+                                                 ILocatorFilter *lspFilter)
     : m_cppFilter(cppFilter), m_lspFilter(lspFilter)
 {
     setId(CppEditor::Constants::LOCATOR_FILTER_ID);
@@ -139,13 +163,7 @@ ClangGlobalSymbolFilter::~ClangGlobalSymbolFilter()
 void ClangGlobalSymbolFilter::prepareSearch(const QString &entry)
 {
     m_cppFilter->prepareSearch(entry);
-    QList<Client *> clients;
-    for (ProjectExplorer::Project * const project : ProjectExplorer::ProjectManager::projects()) {
-        if (Client * const client = ClangModelManagerSupport::clientForProject(project))
-            clients << client;
-    }
-    if (!clients.isEmpty())
-        m_lspFilter->prepareSearch(entry, clients);
+    m_lspFilter->prepareSearch(entry);
 }
 
 QList<LocatorFilterEntry> ClangGlobalSymbolFilter::matchesFor(
diff --git a/src/plugins/clangcodemodel/clangdlocatorfilters.h b/src/plugins/clangcodemodel/clangdlocatorfilters.h
index 11cf4c00b6b..3a6011b8eea 100644
--- a/src/plugins/clangcodemodel/clangdlocatorfilters.h
+++ b/src/plugins/clangcodemodel/clangdlocatorfilters.h
@@ -15,7 +15,7 @@ class ClangGlobalSymbolFilter : public Core::ILocatorFilter
 public:
     ClangGlobalSymbolFilter();
     ClangGlobalSymbolFilter(Core::ILocatorFilter *cppFilter,
-                            LanguageClient::WorkspaceLocatorFilter *lspFilter);
+                            Core::ILocatorFilter *lspFilter);
     ~ClangGlobalSymbolFilter() override;
 
 private:
@@ -23,7 +23,7 @@ private:
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
                                                const QString &entry) override;
     Core::ILocatorFilter * const m_cppFilter;
-    LanguageClient::WorkspaceLocatorFilter * const m_lspFilter;
+    Core::ILocatorFilter * const m_lspFilter;
 };
 
 class ClangClassesFilter : public ClangGlobalSymbolFilter
diff --git a/src/plugins/languageclient/locatorfilter.cpp b/src/plugins/languageclient/locatorfilter.cpp
index f646209e28d..29619496c50 100644
--- a/src/plugins/languageclient/locatorfilter.cpp
+++ b/src/plugins/languageclient/locatorfilter.cpp
@@ -216,21 +216,23 @@ WorkspaceLocatorFilter::WorkspaceLocatorFilter(const QVector<SymbolKind> &filter
 
 void WorkspaceLocatorFilter::prepareSearch(const QString &entry)
 {
-    prepareSearch(entry, LanguageClientManager::clients(), false);
+    prepareSearchHelper(entry, LanguageClientManager::clients(), false);
 }
 
-void WorkspaceLocatorFilter::prepareSearch(const QString &entry, const QList<Client *> &clients)
+void WorkspaceLocatorFilter::prepareSearchForClients(const QString &entry, const QList<Client *> &clients)
 {
-    prepareSearch(entry, clients, true);
+    prepareSearchHelper(entry, clients, true);
 }
 
-void WorkspaceLocatorFilter::prepareSearch(const QString &entry,
-                                           const QList<Client *> &clients,
-                                           bool force)
+void WorkspaceLocatorFilter::prepareSearchHelper(const QString &entry,
+                                                 const QList<Client *> &clients, bool force)
 {
     m_pendingRequests.clear();
     m_results.clear();
 
+    if (clients.isEmpty())
+        return;
+
     WorkspaceSymbolParams params;
     params.setQuery(entry);
     if (m_maxResultCount > 0)
diff --git a/src/plugins/languageclient/locatorfilter.h b/src/plugins/languageclient/locatorfilter.h
index a6e107e97eb..58d8560c8e7 100644
--- a/src/plugins/languageclient/locatorfilter.h
+++ b/src/plugins/languageclient/locatorfilter.h
@@ -77,7 +77,7 @@ public:
     /// request workspace symbols for all clients with enabled locator
     void prepareSearch(const QString &entry) override;
     /// force request workspace symbols for all given clients
-    void prepareSearch(const QString &entry, const QList<Client *> &clients);
+    void prepareSearchForClients(const QString &entry, const QList<Client *> &clients);
     QList<Core::LocatorFilterEntry> matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future,
                                                const QString &entry) override;
 signals:
@@ -89,7 +89,7 @@ protected:
     void setMaxResultCount(qint64 limit) { m_maxResultCount = limit; }
 
 private:
-    void prepareSearch(const QString &entry, const QList<Client *> &clients, bool force);
+    void prepareSearchHelper(const QString &entry, const QList<Client *> &clients, bool force);
     void handleResponse(Client *client,
                         const LanguageServerProtocol::WorkspaceSymbolRequest::Response &response);